This indicates that there were suspect transactions in the BBMS web portal https://bbms.blackbaud.com that were not accepted or refunded in their disbursement period. The date a suspect transaction is accepted or refunded from suspect is date the item is considered as disbursable.

After 60 days, the disbursements team will force these suspect transactions into the next disbursement as long as they do not look suspicious.

What is a Suspect Transaction, and what makes it appear as Suspect?
How to accept or refund a suspect transaction